Fastening device and method of using the same

1. A fastening device, which is used to fasten an electronic device, the electronic device has a plurality of positioning holes on its bottom side, the fastening device comprising: a sliding unit, being used to snap and carry the electronic device, the sliding unit comprising: two guiding rails and a pushing portion, two ends of the pushing portion respectively connecting with ends of the two guiding rails, to form a U shape structure; and a plurality of positioning pins disposing on the two guiding rails, positions and quantities of the positioning pins corresponding with positions and quantities of the plurality of positioning holes, the positioning holes of the electronic device and the positioning pins of the sliding unit snapping with each other, to achieve X axis and Y axis fixation between the sliding unit and the electronic device; and a carrier unit for connecting with the sliding unit, the carrier unit comprising: a plate unit having two vertical side plates on its two sides and connecting with a horizontal surface of the plate unit, to form another U shape for accepting the electronic device; a plurality of first limiting units, being disposed on the plate unit, one end of each of the first limiting units connect to one of the two side plates, to form a plurality of inserting spaces with the plate unit, the inserting spaces being used for inserting a part of each of the two guiding rails, the first limiting units being for preventing the sliding unit from moving along a Z axis and the X axis; a plurality of second limiting units, being disposed on ends of the two side plates, extending toward the Z axis, and having a bending angle extending slantwise upwardly towards the first limiting units along the Y axis, to limit movement of the electronic device along the Z axis; and a link-handle, being disposed on one end of the plate unit opposite to the second limiting units, the link-handle pushing the pushing portion while rotating, to make the sliding unit move along the Y axis.

2. The fastening device according to claim 1 , wherein the link-handle comprises a protrusion and a through hole, the protrusion is used to push the pushing portion to make the sliding unit move along the Y axis.

3. The fastening device according to claim 1 , wherein the fastening device further comprises a pivot axle, which is used to penetrate the through hole of the link-handle, one end of the pivot axle connects with the plate of the carrier unit, an opposite end of the pivot axle forms a flat head, an area of the flat head is larger than an area of the pivot axle, to prevent the link-handle from leaving the pivot axle and make the link-handle rotatively connect with the carrier unit.

4. The fastening device according to claim 1 , wherein the pushing portion is disposed on one side opposite to the second limiting units and has a cavity, the link-handle pushes a side of the pushing portion defining the cavity to make the sliding unit move along the Y axis.

5. The fastening device according to claim 1 , wherein the cavity is disposed on one end of the pushing portion connecting to one of the two guiding rails.